These biofilms (or pellicles) are reported to have a rigid, paper-like consistency [13].
In 2004, mathematician Erik Demaine of the Massachusetts Institute of Technology in Cambridge and his colleagues proposed a theoretical pattern of origami creases that could be set into a tall bag made from something more rigid than paper and allow the bag to be folded flat.
Cutting patterns may be made of rigid or semirigid paper or plastics.
In an article published 12 July, entitled The Art of Circumventing Rigid Requirements, the paper explains why it sent cartoonist Francis Desharnais to the concert at the Festival d'été in Québec City: "When the Foo Fighters claim rights to pictures of them in concert, they do not do it halfway.
In this paper, rigid elements along with nonlinear line interface elements are utilized to model masonry structures.
A related concept bearing more promise, i.e. the "micellar reinforcement", is introduced in this paper: rigid chains that are provided with flexible grafts can form reinforcing cylindric micelles in thermoplastic matrices.
If the spider is on the ceiling, get a clear cup or glass (so you can see through it) and a rigid slip of paper or index card.
While British papers may operate with less rigid principles than American papers (Dow Jones, for example, has long prohibited journalists from owning shares in companies that they cover), they do carefully watch themselves in one area: libel.
As a further difference from the precedent papers, where the flanks of the wedge are absorbing, they are rigid in the present paper.
A theoretical model is developed for the exact contact analysis of magneto-electro-elastic half-plane materials indented by a moving rigid punch in this paper, which is Part I of a series of papers.
